cros: Allow timezone change for non guest users.

chrome/browser/chromeos/settings/system_settings_provider.cc

Index: chrome/browser/chromeos/settings/system_settings_provider.cc
diff --git a/chrome/browser/chromeos/settings/system_settings_provider.cc b/chrome/browser/chromeos/settings/system_settings_provider.cc
index d1258186d35d317035467b767e3d368a18f0df92..5e25aa86322f08fc78b51ed434b8fdfaef765c05 100644
--- a/chrome/browser/chromeos/settings/system_settings_provider.cc
+++ b/chrome/browser/chromeos/settings/system_settings_provider.cc
@@ -33,7 +33,7 @@ SystemSettingsProvider::~SystemSettingsProvider() {
 void SystemSettingsProvider::DoSet(const std::string& path,
                                    const base::Value& in_value) {
   // Non-guest users can change the time zone.
-  if (!LoginState::Get()->IsUserAuthenticated())
+  if (LoginState::Get()->IsGuestUser())
     return;
 
   if (path == kSystemTimezone) {